| 摘要 |
PURPOSE:To obtain developed color images of constant and high density at all times by using a nonpolar org. medium which dissolves a specified org. amine and does not dissolve the components of a photosensitive layer and a produced dye. CONSTITUTION:Org. amine to be used is selected from all of org. amines which are soluble in a nonpolar solvent, have >=150 deg.C, preferably >=170 deg.C b.p., and are liq. at ordinary temp. Silicone oil is used as the nonpolar solvent for dissolving the specified org. amine. Silicone oil is a colorless, nonpolar and oily matter with superior heat and chemical resistances made of straight chain dimethylpolysiloxane. The b.p. and viscosity of silicone oil depend on the mol. wt. The preferred b.p. is >=150 deg.C. The viscosity is not especially restricted, yet silicone oil with excessively high viscosity is not preferably used as the solvent of a developer for diazo copying when spreadability on diazo sensitive paper, permeability and the extent of sticking are taken into consideration. |
